Mainstream Capital Management LLC reported 165 positions worth $102.21M for the quarter ended Sep 30, 2026, up 1.5% on the prior quarter. It opened 115 new positions, added to 18, trimmed 27 and exited 3. Its largest holding is Apple Inc. at 11% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| MSFT Microsoft Corp | +1,677 | +31.1% | $860.13K | 3.55% |
| NVDA Nvidia Corp | +2,905 | +10.5% | $663.44K | 6.82% |
| GBTC Grayscale Bitcoin Trust ETF | +3,518 | – | $227.23K | 0.222% |
| GLW Corning Inc | +1,304 | +9.1% | $200.50K | 2.35% |
| PLTR Palantir Technologies Inc. | +967 | +50.2% | $180.88K | 0.529% |
| DIS Walt Disney Co | +1,618 | – | $169.73K | 0.166% |
| CEG Constellation Energy Corp | +551 | +17.6% | $139.97K | 0.915% |
| JNJ Johnson & Johnson | +460 | – | $121.78K | 0.119% |
| BA Boeing Co | +626 | +32.3% | $116.47K | 0.467% |
| BE Bloom Energy Corp | +380 | – | $105.25K | 0.103% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| DOV DOVER Corp | -5,666 | -99.6% | $1.06M | <0.01% |
| UBER Uber Technologies, Inc | -11.0K | -100.0% | $797.30K | Exited |
| HD Home Depot, Inc. | -2,061 | -100.0% | $726.87K | Exited |
| BABA Alibaba Group Holding Ltd | -6,180 | -71.7% | $664.60K | 0.257% |
| GLD Spdr Gold Trust | -1,003 | -18.0% | $381.98K | 1.71% |
| GOOG Alphabet Inc. | -711 | -3.5% | $242.27K | 6.5% |
| ETHA iShares Ethereum Trust ETF | -12.8K | -100.0% | $152.78K | Exited |
| AAPL Apple Inc. | -434 | -1.3% | $144.53K | 10.97% |
| CVX Chevron Corp | -683 | -13.4% | $139.48K | 0.884% |
| WMT Walmart Inc. | -1,296 | -10.0% | $134.68K | 1.18% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| GBTC Grayscale Bitcoin Trust ETF | +3,518 | $227.23K | 0.222% |
| DIS Walt Disney Co | +1,618 | $169.73K | 0.166% |
| JNJ Johnson & Johnson | +460 | $121.78K | 0.119% |
| BE Bloom Energy Corp | +380 | $105.25K | 0.103% |
| CPAY Corpay, Inc. | +257 | $99.87K | 0.098% |
| PINS Pinterest, Inc. | +5,000 | $94.45K | 0.092% |
| PFE Pfizer Inc | +2,964 | $84.53K | 0.083% |
| SHAK Shake Shack Inc. | +1,389 | $81.51K | 0.08% |
| CBRE Cbre Group, Inc. | +610 | $78.37K | 0.077% |
| ABBV AbbVie Inc. | +299 | $78.22K | 0.077% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | AAPL Apple Inc. | Technology | 33.7K | $11.21M | 10.97% | -434 | -1.3% | Reduced | 0% |
| 2 | AMZN Amazon Com Inc | Consumer Discretionary | 30.7K | $7.66M | 7.49% | -232 | -0.7% | Reduced | 0% |
| 3 | NVDA Nvidia Corp | Technology | 30.5K | $6.97M | 6.82% | +2,905 | +10.5% | Added | 0% |
| 4 | GOOG Alphabet Inc. | Technology | 19.5K | $6.65M | 6.5% | -711 | -3.5% | Reduced | 0% |
| 5 | META Meta Platforms, Inc. | Technology | 7,555 | $5.48M | 5.36% | +52 | +0.7% | Added | 0% |
| 6 | CRWD CrowdStrike Holdings, Inc. | Technology | 14.0K | $3.72M | 3.63% | +201 | +1.5% | Added | 0% |
| 7 | MSFT Microsoft Corp | Technology | 7,075 | $3.63M | 3.55% | +1,677 | +31.1% | Added | 0% |
| 8 | PANW Palo Alto Networks Inc | Technology | 7,570 | $3.01M | 2.94% | -143 | -1.9% | Reduced | 0% |
| 9 | GOOGL Alphabet Inc. | Technology | 8,712 | $3.00M | 2.93% | -128 | -1.4% | Reduced | 0% |
| 10 | JPM Jpmorgan Chase & Co | Financial Services | 8,515 | $2.82M | 2.76% | -223 | -2.6% | Reduced | 0% |
| 11 | BRK-B Berkshire Hathaway Inc | Financial Services | 5,386 | $2.68M | 2.62% | -14 | -0.3% | Reduced | 0% |
| 12 | LLY ELI LILLY & Co | Healthcare | 2,278 | $2.64M | 2.58% | +28 | +1.2% | Added | 0% |
| 13 | GLW Corning Inc | Basic Materials | 15.6K | $2.40M | 2.35% | +1,304 | +9.1% | Added | 0% |
| 14 | AMD Advanced Micro Devices Inc | Technology | 3,900 | $2.39M | 2.33% | -130 | -3.2% | Reduced | 0% |
| 15 | COST Costco Wholesale Corp | Consumer Staples | 2,347 | $2.14M | 2.09% | +24 | +1.0% | Added | 0% |
Tip. Select a row to see that position’s full history at Mainstream Capital Management.
As of its Q3 2026 13F filing, Mainstream Capital Management LLC’s five largest positions were Apple Inc. (AAPL) at 11.0%, Amazon Com Inc (AMZN) at 7.5%, Nvidia Corp (NVDA) at 6.8%, Alphabet Inc. (GOOG) at 6.5%, Meta Platforms, Inc. (META) at 5.4% of the reported portfolio.
Mainstream Capital Management LLC reported a 13F portfolio worth $102.21M across 165 positions for Q3 2026. That is up 1.5% from the previous quarter.
Its largest purchases by value were Microsoft Corp ($860.13K), Nvidia Corp ($663.44K), Grayscale Bitcoin Trust ETF ($227.23K). It opened 115 new positions.
Its largest sales by value were DOVER Corp ($1.06M), Uber Technologies, Inc ($797.30K), Home Depot, Inc. ($726.87K). It exited 3 positions entirely.
From the Form 13F-HR reports Mainstream Capital Management LLC files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.